Pantheon is often neglected in favor for high burst champions in the top and mid lanes. As such, his skirmishing tactics often feel lackluster. He has excellent harass and dueling potential, however not being resourceless, like Riven, Rumble and Garen, takes its toll on the veteran gladiator. However, Pantheon jungle avoids these issues. He's still a threat early game, with decent base movespeed and a short cooldown stun, but does not have the mana issues thanks to blue buff. Additionally, his farming potential means camps are cleared fast. Pantheon excels at split pushing and zone denying with his ultimate, allowing total domination in team fights if used right

Power Summary:
Clear Speed: 7/10
Ganks: 6/10
Map Control: 8/10
Sustain: 5/10 early thanks to Aegis, 10/10 late (after Bloodthirster)
Counterjungle: Not very effective at counterjungling, but he'll be ganking most of the time anyway, 3/10
Safe from Invade?: I wouldn't recommend invading a Pantheon at his red, 7/10

Ganks:
Try to cut off the exit by not initiating with your Aegis, but instead waiting for your teammate to initiate with some hard cc. A Jax or Renekton top would be very useful. Make your presence known, running into lane and stopping them from escaping past you. If they attempt to flash, just jump them with Aegis and proceed to wail on them. At worst you burn a flash

Teamfights:
Beeline for the carry and jump on them, whoever they may be. Your team should follow up with tons of damage, allowing you to finish off the squishy with a critical spear. After that, retreat until your cooldowns refresh, jump on the next squishy and rinse repeat

Split Pushing:
Pushing top and bot has never been easier with an amazing global ultimate at his disposal. Pantheon can join a teamfight at any time. Remember not to split push without deep wards, as Pantheon has no escapes